Yarn winding



G. M. KARNS YARN wINDNG July 2o, 1943,-

George' [farla IME-'mon ATTORNEY July 20, 1943. G. M. KARNs n 2,324,584

" YARN WINDING vFiles-@11:80. so, 1941 2 sheets-sheet 2 George M;Karns INVENTOR El/5x4- l v l f A oRNEY l Patented July 2i),

UNITED STATES PATENT OFFICE YARN WINDING George M. Earns, Swarthmore, Pa., aasignor to E. I. du Pont de Nemours & Company, Wilmington, Del., a corporation of Delaware Appucnticn December so, 1941, semi Nc. 424,845

(Cl. iBS-32) 11 Claims.

This invention relates to yam winding, and more particularly it relates to a new and improved method and apparatus for the beaming of yarn, and to a new and improved beamed package of yarn.

The beaming p1' yarn is common practice in the textile industry, and comprises the simultaneouswinding of a large number of yarns (10o to 500 or more yarns) in parallel, side-by-side relationship on to a yarn support commonly referred to as a beam. Such 'beam packages of yarn are conventionally used inthe weaving lndustry where the many parallel yarns, when unf wound from the beam, serve as the warp threads in a weaving operation. Beam packages of yarn are 'also used in the shipment of yarns to tire cord manufacturers, the latter simultaneously unwinding the yarns and plying and twisting two tinuity of cu cf the vfilaments contained therein. Ii' one or more single filaments are broken from .such an untwisted yarn bundle, there will be nov force exerted on these iilaments to hold themg to that bundle `and cause them to unwind with 'itfrom the beam package in the usualmanner;

, -they will more probably cling to the beam package and wrap about it. 4lThis wrapping'oi broken l laments not only aifects the individual yarn from which the filaments are broken, but also tends to abrade adjacent yarns contained on the.

beam and break individual filaments loose from 4 locate that broken end in the package. In Ilact.l

beam surface. This traverse stroke is relatively short, however, and even in thevcase of a 52- lnch beam, it rarely exceeds of an inch. Thus,

even in'an extreme case, the yarns are wound on the beam in a substantially parallel ribbon` 'wind manner and the fully wound package is substantially free of helical crossings of the sheet.

Prior to the' present invention, it wasconsidered necessary to' bind together the laments of continuous filament artiilcial yarns before the latter could be satisfactorily, beamed. Such binding of the filaments was carried out-by imparting atwist of at least 4 or 'turns per inch to the I yarn, or by sizing theyarn and forming the .it is possible that the filaments comprising that yarn may become associated with the niamentl -ot adjacent .yarns so that it is practically imof adjacent yarns, or filaments or adjacent yarns,

even though such yarns or filaments are broken. andeven though the iilaments of the individual yarns are not bound together.

It lsalso an object of the present invention -to provide' a method and apparatus for winding `a beamed package of yarns which maybe unwound 'without entanglement of adjacent yarns.

, or filaments 'of adjacent yarns, regardless o! il i.

whether such yarns* or illaments become broken during the winding operation.

Other objects of the invention hereinafter.

The objects of this invention are accomplished, in general, byl simultaneously winding, on to a beam, a plurality of parallel, untwisted yarn ends' and, at the same time, traversing asingle thread of suitable strength back and forth along the Y entire length of the beam'package so as to lie between, and separate, successive layers of the sheet vof parallel, untwisted. beamed yarns.

Later, during thev unwinding operation, this willappear...

thread being collected on a separate yarn support, such as a pirn, bobbin or spool.

The traverse thread of this invention acts in the following manner to aid the unwinding operation. So long as the sheet of yarn is coming from the beam in a normal and satisfactory manner, the traverse thread will be unwound from on top of each successive layer of yarn and will have no eflect on theseyarns or on the unwinding operation. However, if one or more filaments break and become separated from their respective yarn bundles and Wrap about the beam, the. traverse thread will be positioned under that wrap and will break it during the unwinding operation. Those lengths of the filaments forming the Wrap will then be carried by the traverse thread from the beam to a point where they can do no harm to either their own or adjacent yarn bundles.v Thus, the traverse thread of this invention will prevent the formation of dangerous filament wraps during the unwinding operation. Or, if an entire yarn should break, the traverse thread will act in a similarv manner to prevent that yarn from wrapping itself about the beam.

Most beaming equipment in use today is provided with suitable stop motion devices that operate to stop the unwinding operation in case such an entire yarn breaks. Thus, there is little likelihood that a completely broken yarn will wrap itself about ythe beam without stopping the winding operation. Nevertheless, the traverse thread of the present invention still aids importantly in the event of such. abreak. As has already been mentioned, when an untwisted continuous lament yarn contained in a beam package breaks, the free ends of the individual filaments comprising that yarn tend to cling to adjacent dr underlying yarns and associate themselves therewith so that it is diiiicult if not impossible to reassemble all those broken filaments into the form of their original bundle and proceed with the unwinding operation. The present invention overcomes this difiiculty, however, in-v asmuch Jas the traverse thread makes it possible to lift from the beam package all the yarn contained in the outer `sheet layer. When this is done, the filaments of the broken yarn (also lifted free of the beam) can be readilyy observed and gathered together into their proper yarn bundle. Thus, the present invention also makes it possible to locate and reassemble a broken yarn contained in a beam package.

The details of the present invention will be more readily understood by reference to the following detailed description, when taken in connection with the accompanying drawings, in which; g

Figure 1 is a diagrammatic perspective view showing apparatus suitable for use in accordance with the present invention. y

Figure 42 is a diagrammatic side elevational view of the device shown in Figure 1.

Figure 3 is a .front elevational view showing the essential features ofthe device of Figure 1 and detailed means for operating the same.

Figure 4 illustrates a modiied form of yarn traversing mechanism suitable for use in accordance with the present invention.

Figure 5 is an enlarged detailed view showing the manner in which 'the traversing yarn is positioned between layers of the beamed yarn.

Figure 6 is a diagrammatic side elevational View showing one form of apparatus for use in unwinding the beamed yarn. n A

Figure 7 is a diagrammatic side elevational view showing a modified form of apparatus for the unwinding of the traversing yarn.

Referring to Figures 1 and 2'of the drawings,

reference numeral II designates a beamed yarn package, the beam being provided with flanges I3 and I5 and operating shaft I1. vA plurality of yarns I9, from any desired source such as a bank of small yarn packages, is simultaneously A package of wound yarn 23 is positioned below vthe continuous sheet of yarns I9. A yarn guide 21 is positioned above yarn package 23 and the yarn 25 is passed from the package 23 through guide 21' then through traversing guide 29 and on to the beam package immediately under the sheet of yarns I9 as the latter contacts the beamed package II. The traverse guide 29 is traversed by means of traverse bar 3 I- which may be reciprocated by hand or by any desired mechanical device. over a straight edge of a bail or plate .33. This functions to position the yarn on the beam package more evenly. The traverse bar 3l and guide 29 are reciprocated longitudinally of the beam'as yarn 25 and the beamyarns I9 are wound on to the package.

Referring to 3 of the drawings, in which parts which are the same as those shown in Figures 1 and 2 are designated by like reference characters, the traverse bar 3I is reciprocated by means of grooved cam 4I. A groove following pin 45 positioned on the end of bar 3| rides in the groove 43 of the grooved cam 4I. Upon rotation of the cam by means of motor 41, shaft 48 and sprocket chain 49, the pin 45 moves back and forth across the face of the cam thereby causing yarn guide 29 to reciprocate across the face ofthe beam II. The beam II may'be rotated by meansIl of the same motor 41 by connecting a sprocket chain 5I between beam shaft II and cam shaft 48.

Referring to Figure 4 ofthe drawings, which again shows like parts by like reference characters, two thread guides 29 are mounted 0n individual sleeves 6I which are adapted' to slide back and forth across xed bar 63. A- cam 6I, containing two cam grooves 61 in side-by-side relationship is positioned adjacent baril. Each sleeve 6I is provided with a cam groove following pin 69 which is adapted to ride in a groove 61 of cam 55. 4The cam 65 is rotated by means of cam shaft 68 through gears II and 13 which are driven by motor 41. As the cam 65 rotates, thesleeves 6I and yarn guides 29 are slid back and-forth longitudinally of the beam on the xed bar 63. Each sleeve is traversed one-half the distance across the beam II and two yarns 2l are thereby positioned under the sheet of beamed yarns I9, as shown/ If desired, the beam II may be driven by connecting the cam shaft II with the beam shaft I1 by means of a sprocket chain Ii or the like. By connecting the beam and the cam a synchronized movement of the traverse yarns with the beamed yarns will be obtained.

Figure 5 of the drawings illustrates in an enlarged detailed section how the traverse yarn 2l will lie between layers 29 of the beamed yarn.

Figure 6 of the drawings illustrates means-for unwinding 'the beamed yarns together with traverse yarnrfrom the beamed package. The beamed yarns will, of course, be unwound in the conven- 4 tional manner. It is necessary, however, that Preferably, the yarn passesI the traverse yarn 25 be unwound at substantially the same rate as the beamed yarns. If the pull on the traverseyarn is wo great, it will cause this yarn to be pulled frombetween layers of the beamed yarn on the beamed package.- Such a withdrawing oi' the traverse yarn from between layers of the beamed 4yarn may cause abrasion of the filaments of the beamed yarn. n the other hand, if the traverse yarn 25 is collected at a lower speed than the unwinding of the beamed yarns, there is danger of entanglement between the traverse yarn and the beamed yarn. In 'the device shown in Figure 6, the traverse yarn is passed through nxed guides 8| and 83,

the latter being positioned substantially above a pirn 55 positioned in a ring twisting device. The yarn 25 is passed to the pirn and is wound thereon with that tension imparted thereto by the ballooning of the yarn passing to the follower l of the ring twisting device. The pull on the yarn will always be the same and the beamed yarns la my be witmrswnfrom the beam at varying speeds without substantially varying the tension on the traverse yarn 25. l

Referring to the apparatus shown in Figure '1,

the traverse yarn 25 is passed from the beamed,

j package through guide 81 to a flanged spool 85 which is driven by rotating shaft 9| through ball bearings 95. The slight friction between the shaft 9i and the hall bearings and between the ball bearings and the flanged spool 52 will be sufiicient to impart a slighttension to traverse yarn 25. The tension on traverse yarn 25 will be suilicient to continue to unwind the' same as the'beamed yarns are being unwound but will be insuiiicient to drag the yarn from between layers` of the beamed yarn on the vbeamed package.v

It will be obvious to anyone skilled in the art that numerous other devices for unwinding the traverse yarn simultaneously with the beamed yarns can be employed. Forfexample, the traverse yarn 25 may be withdrawn by hand, or even on a positively driven spool, the-rotational speed A of which is synchronized with the rotational speed of the beam.

'I'he speed of traverse of traverse yarn 25 may vary greatly in accordance with the type and structure of the beamed yarns. In general, vitis preferred that the traverse yarn is traversed a distance at least equal to the length of the beam for each complete rotation of the beam. In the case of yarns comprising continuous artincial filaments having no twist, it is found desirablev to traverse the traverse yarn at a speed equal to two lengths of the beamror each complete revolution of the beam. Again, i! the beam is of large diameter, it may be `desirable to gradually increase the 'speed of the traverse guide so Othat the length of the' sheet of beamed yarns wound on the beam between successive crossings of the traverse threads will remainapproximately the same. The speed oi.' traverse of the traverse yarn will also depend somewhat upon the strength of,

- yarn end can be readily located on a beamed i is preferably of small diameter it will not be necessary to traverse the traverse yarn across the whole length of the beam.

The traverse thread may be composed of any desired material, for example, cotton, linen, silk, nylon, or other natural or artiiicial materials. Preferably, the traverse yarn is constructed from continuous filaments which lhave considerable" strength such as nylon or silk. 'I'he traverse yarn with a medium to high twist.

'I'he method provided by the present invention was devised for use in connection with the wind- .ing of a plurality of continuous filament yarns possessingsubstantially no twisten to a beam package and it naturally finds its greatest utility in such instances. It makes the formation and ksubsequent unwinding of-` such packages entirely feasible from the standpoint of both yarn quality and ease of operation. When used in connection with the sizing and yarn shaping treatment provided by U. '8. Patent No. 2,224,665to Bradshaw and Standley, the beam package obtained may be unwound withalmost complete freedom from yarn lbreaks and wraps. Although it -nds ,its most important use in connection with the winding lof untwisted yarns on to Aa beam package, -the invention is not so limited. -It may also be used to advantage in the beaming of twisted yarns since it provides a positive method of removing fromthe beam I package any broken yarn ends or loose filaments that may occasionally form in such package whetherit contains untwisted or twisted yarns.

Yarn beamed in accordance with the present invention may be readily and smoothly unwound without entanglement of filaments or yarns. The method of beaming yarns of the present invention may be employed even when the nlaments are untwis'ted and free from size binding the filaments together. In cases where an individual filament has become broken from the remainder of its yarn bundle, the invention operates to lift that filament from the beam package and carry i-t to a point where it can do no harm to other yarns contained in the package.

The invention provides means whereby a broken package of untwisted continuous lament yarns.

The method and .apparatus oi' the present invention are simple inconstruction and economical to operate. Furthermore, the apparatus can be readily installed on existing types of beaming equipment.

Bince it is obvious that many changes and modifications can be made in the'above-described details without departing from the nature and spirit of the invention, it is to be understood that .the invention is not to be limited to the details described herein except as set forth in the appendedclaims. v

Iclaim:

l. A beam packagel7 of yarncomprising a plurality of yarns wound in parallel, side-by-side relationship without substantial traverse, and a single yarn wound with a traverse from end to end of said package between layers .of said plu- Vrality of yarns, said single yarn readily withdrawable in the subsequent unwinding ofvsaid plurality of yarns to prevent objectionable entanglements of filaments. y

2. A beam package of yarn as denned-in claim 1 in which the said single yarn is wound with a traverse of at least the length of said package for each circumferential layer of said plurality of yarns.

3. .A beam package of yarn as defined in claim l in which said plurality of yarns is composed of continuous filaments.

`4. A beam package of yarn as dened in claim 1 in which said plurality of yarns is composed of continuous, unbound illaments.

5. I-n the winding of a 'plurality of yarns in parallel, side-by-side relationship on to a beam the step of simultaneously winding a single yarn, with a traverse from end to end of said beam,

'between layers of said plurality of yarns, said single yarn readily withdrawable in the subse quent unwi-nding of said plurality of yarns to prevent objectionable entanglement of laments.

v6. In the winding ofI a plurality of yarns in parallel, side-by side relationship onto a beam, the

step of simultaneously winding a single yarn, with A l a traverse from end to end of said beam, between layers of said pluralityof yarns, the speed of traverse of said single yarn being at least equal to the length of the beam for each revolution of said beam.

7. In the winding of a plurality. of yarns in parallel, side-by side relationship onto a beam, the step of simultaneously winding a single yarn, with a traverse from end to end of said beam, Abetweenr layers of 'said plurality of yarns, the speed ofl traverse of said single yarn being approximately equal to twice the length of said beam for each revolution of said beam.

8. A beaming apparatus comprising a rotatable beam, means for guiding a plurality Aof yarns in ments 'in the unwinding of beamed yarns which a comprises withdrawing, under ,tension and to a4 parallel, side-by-side relationship on to saidbeam, a yarn guide spaced from 'said means for guiding a single yarn on to said beam, and means for reciprocating said yarn guide from end to end of said beam.

9. 'I'he process which comprises winding a plurality of yarns in parallel side-by-side relation--4 separate destination. a yarn wound with a substantial traverse between layers of said beamed yarns.

' 11. The method of preventing objectionable entanglement of adjacent yarns and yam niame'nts i-n the unwinding of beamed yarns which comprises withdrawing, under tension and at a linear speed in excess of. that oi' the unwinding "of the beamed yarns, a yarn wound with a substantial traverse between layers of said beamed Yarns.

GEORGE M. KARNS. 

